WorksheetsUnit 4: Rot/Lin Speed Warm-Up
Total questions: 8
Worksheet time: 25mins
Find the area of the sector, rounding your answer to 1d.p. (use the pi key in the calculator or 3.14)
67.1cm2
67.0cm2
16.8cm2
134.0cm2
Find the area of the shaded sector of the circle. Leave your answer in terms of π. Pro Tip: Find the angle for the yellow section FIRST.
A gear spins at a rate of 400 revolutions/minute. Which choice is closest to its angular speed in radians/second? (Use the pi key in the calculator or 3.14, round to the nearest tenth.)
6.67 rad/s
2500 rad/s
41.9 rad/s
20.9 rad/s
A record spins at 33 rpm (revolutions per minute). What is the approximate linear speed (in cm per second) of a fly that sits on the record, 12 cm from the center? (Use the pi key in the calculator or 3.14, round to the nearest tenth.)
3.4 cm/s
21.5 cm/s
41.5 cm/s
131.9 cm/s
A child sits 0.75 m from the center of a merry go round. The merry go round makes one revolutions in 4 seconds. What is the child's linear speed? (Use 3.14 as pi, and Round your answer to tenths)
1.9 m/s
1.2 m/s
12.6 m/s
4.71 m/s
